CHEMISTRY HIGH SCHOOL

I have a question about isotopes, i understand what they are however i can't answer this question for school. it doesn't seem like i have enough info to answer the questionWrite the symbols for the following isotopes.
Its atoms contain 50 electrons and 70 neutrons
Express your answer as an isotope.

Answers

Answer 1
Answer: it is most likely that the isotope isnt charged. So i would say there are equal amounts of neutrons as protons. 
50 protons + 70 neutrons+ 120 atomic mass of isotope and 50 is the atomic number so i believe its Sn

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What is the name for Na20?

Why does secondary succession usually occur more rapidly than primary succession.

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Secondary succession occurs more rapidly than primary because soil is already available so there is no need for any other species. Also, there might still be surviving species in the soil present like seeds, roots and other plant organs.

You've just solved a problem and the answer is the mass of an electron, me=9.11×10−31kilograms. How would you enter this number into the answer box?

Answers

The mass of an electron can be expressed in the box as \boxed{{m_e} = 9.1 * {{10}^( - 31)}{\text{ kg}}}.

Further explanation:

Atom is the smallest particle that can be present in any element. It is also known as the building unit of matter. Each atom has a central part that is known as the atomic nucleus. There are three subatomic particles that constitute the atom. These particles are protons, neutrons, and electrons. The atomic nucleus consists of protons and neutrons, both are collectively called nucleons. Electrons revolve around the nucleus of an atom in definite orbits.

Protons are positively charged subatomic particles, electrons are negatively charged and neutrons have no charge. Since electrons carry a unit negative charge, these create an electric field around them. These also participate in nuclear reactions. The mass of an electron \left( {{m_e}} \right) is 9.1 * {10^( - 31)}{\text{ kg}}, that of protons is 1.6726219 * {10^( - 27)}{\text{ kg}} and that of neutrons is 1.674927471 * {10^( - 27)}{\text{ kg}}. The electrons are responsible for chemical properties of elements. The distribution and arrangement of electrons is used to predict whether the element will be inert or reactive.

Therefore the required answer is \boxed{{m_e} = 9.1 * {{10}^( - 31)}{\text{ kg}}}.

Learn more:

  1. Component of John Dalton’s atomic theory: brainly.com/question/2357175
  2. Basis of investigation for the scientists: brainly.com/question/158048

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Atomic structure

Keywords: atom, matter, atomic nucleus, proton, electron, neutron, subatomic particle, nuclear reactions, electric field, reactive, inert.

Help with this
I don't understand this

Answers

Answer: Galaxy  D is what i got and it says ts is right

Explanation:

the red line on d is closer than the rest

The noble-gas notation for tin (Sn) will contain the symbol

Answers

The noble gas notation is as follows- you must start with the noble gas that is before the element which in this case is Krypton and then from there you continue the electron configuration as follows- [Kr] 5s^2 4d^10 5p^2

its Kr on edg. i just took the pretest

Molecules in a sample of NH3(l) are held closely together by intermolecular forces(1) existing between ions(2) existing between electrons(3) caused by different numbers of neutrons(4) caused by unequal charge distribution

Answers

Molecules in a sample of NH3(l) are held closely together by intermolecular forces existing between ions. The answer is number 1. NH3 is governed by hydrogen bonding. Hydrogen bonding is the bonding between an H atom and the element that it combines with.

Answer:

D) Caused by unequal charge distribution

Explanation:

Which pair of nuclei can undergo a fusion reaction?a) uranium-238 and lead-208
b) hydrogen-2 and hydrogen-3
c) zinc-64 and calcium-44 d) potassium-40 and cadmium-113

Answers

The correct answer is B. Fusion only happens between small atoms. Thus, hydrogen-2 and hydrogen-3 can undergo fusion. Fusion reaction happens when two or more nuclei combine or collide to form an element with a higher atomic number. In this process, some of the matter of the fusing nuclei is converted to energy.
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